<?php

use think\Model;
use think\Request;

class qq extends Model{
	//回调地址
	public $returnUrl;
	// 应用id
	public $appId;
	// 应用密室
	public $appSecret;

	/**
     * 构造函数
     */
	public function __construct(){
		$this->returnUrl 	= 'http://'.$_SERVER['HTTP_HOST'].'/index.php/book/member.login/callback/oauth/qq';
		$this->appId 		= '';
		$this->appSecret 	= '';
	}

	//构造要请求的参数数组，无需改动
	public function login(){
		$_SESSION['state'] = md5(uniqid(rand(), TRUE));
		//拼接URL
		$dialog_url = "https://graph.qq.com/oauth2.0/authorize?response_type=code&client_id="
			. $this->appId . "&redirect_uri=" . urlencode($this->returnUrl) . "&state="
			. $_SESSION['state'];
		echo("<script> top.location.href='" . $dialog_url . "'</script>");
		exit;
	}

    /**
     * QQ 登录返回  参考手册 http://wiki.connect.qq.com/%E5%BC%80%E5%8F%91%E6%94%BB%E7%95%A5_server-side
     * @return boolean
     */
	public function respon(){
		if($_REQUEST['state'] == $_SESSION['state']){
			$code = $_REQUEST["code"];
			//拼接URL
			$token_url = "https://graph.qq.com/oauth2.0/token?grant_type=authorization_code&"
				. "client_id=" . $this->appId . "&redirect_uri=" . urlencode($this->returnUrl)
				. "&client_secret=" . $this->appSecret . "&code=" . $code;

			$response = $this->get_contents($token_url);
			if (strpos($response, "callback") !== false){
				$lpos = strpos($response, "(");
				$rpos = strrpos($response, ")");
				$response  = substr($response, $lpos + 1, $rpos - $lpos -1);
				$msg = json_decode($response);
				if (isset($msg->error)){
					echo "<h3>error:</h3>" . $msg->error;
					echo "<h3>msg  :</h3>" . $msg->error_description;
					exit;
				}
			}

			//Step3：使用Access Token来获取用户的OpenID
			$params = [];
			parse_str($response, $params);

			$graph_url = "https://graph.qq.com/oauth2.0/me?access_token=".$params['access_token'];

			$str  = $this->get_contents($graph_url);
			if (strpos($str, "callback") !== false)
			{
				$lpos = strpos($str, "(");
				$rpos = strrpos($str, ")");
				$str  = substr($str, $lpos + 1, $rpos - $lpos -1);
			}
			$user = json_decode($str);
			if (isset($user->error))
			{
				echo "<h3>error:</h3>" . $user->error;
				echo "<h3>msg  :</h3>" . $user->error_description;
				exit;
			}
			// 获取到openid
			$openid = $user->openid;
            // Step5：使用Access Token以及OpenID来访问和修改用户数据
            $user_info_url = "https://graph.qq.com/user/get_user_info?access_token={$params['access_token']}&oauth_consumer_key={$this->appId}&openid=$openid";
            $res  = $this->get_contents($user_info_url);
            $res = json_decode($res,true);
			$_SESSION['state'] = null; // 验证SESSION
			return [
				'openid' 	=> $openid,// QQ openid
				'oauth' 	=> 'qq',
				'nickname' 	=> $res['nickname'],
				'avatar' 	=> $res['figureurl_qq_2'],
			];
		}else{
			return false;
		}
	}

	public function get_contents($url){
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
		curl_setopt($ch, CURLOPT_URL, $url);
		$response =  curl_exec($ch);
		curl_close($ch);

		//-------请求为空
		if(empty($response)){
			exit("50001");
		}
		return $response;
	}
}